Background Advanced ovarian cancer is managed by extensive surgery, which could be associated with high morbidity. A personalized pre-habilitation strategy combined with an ‘enhanced recovery after surgery’ (ERAS) pathway may decrease post-operative morbidity.

Primary Objective To analyze the effects of a combined multi-modal pre-habilitation and ERAS strategy on severe post-operative morbidity for patients with ovarian cancer (primary diagnosis or first recurrence) undergoing cytoreductive surgery.

Study Hypothesis A personalized multi-modal pre-habilitation algorithm entailing a physical fitness intervention, nutritional and psycho-oncological support, completed by an ERAS pathway, reduces post-operative morbidity.

Trial Design This is a prospective, controlled, non-randomized, open, interventional two-center clinical study. Endpoints will be compared with a three-fold control: (a) historic control group (data from institutional ovarian cancer databases); (b) prospective control group (assessed before implementing the intervention); and (c) matched health insurance controls.

Inclusion Criteria Patients with ovarian, fallopian, or primary peritoneal cancer undergoing primary surgical treatment (primary ovarian cancer or first recurrence) can be included. The intervention group receives an additional multi-level study treatment: (1) standardized frailty assessment followed by (2) a personalized tri-modal pre-habilitation program and (3) peri-operative care according to an ERAS pathway.

Exclusion Criteria Inoperable disease or neoadjuvant chemotherapy, simultaneous diagnosis of simultaneous primary tumors, in case of interference with the overall prognosis (except for breast cancer); dementia or other conditions that impair compliance or prognosis.

Primary Endpoint Reduction of severe post-operative complications (according to Clavien– Dindo Classification (CDC) III–V) within 30 days after surgery.

Sample Size Intervention group (n=414, of which approximately 20% insure with the participating health insurance); historic control group (n=198); prospective control group (n=50), health insurance controls (for those intervention patients who are members of the participating health insurance).

Estimated Dates for Completing Accrual and Presenting Results The intervention phase started in December 2021 and will continue until June 2023. As of March 2023, 280 patients have been enrolled in the intervention group. The expected completion of the entire study is September 2024.

Trial Registration NCT05256576.